Control system for main pump measurement circuit of digital nuclear power station

A technology of measurement loop and control system, applied in pump testing, devices using electric/magnetic methods, liquid variable capacity machinery, etc. Reduce to 0 and other problems to achieve the effect of reducing the amount of data, saving costs, and requiring less processing power

Active Publication Date: 2014-09-03
CHINA GENERAL NUCLEAR POWER OPERATION +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are several problems in the main pump measurement circuit of the current digital nuclear power plant. For example, in the main pump speed measurement channel of the Ling Ao Phase II digital nuclear power plant, there are the following problems: First, limited by the processing capacity of the existing processor Limitation, when the speed of the main pump is lower than 915rpm, the display is lost, that is to say, when the speed is lower than 915rpm, the displayed speed is 0; second, the speed frequency signal of the main pump passes through the power distributor and interferes, causing the speed of the main pump to often The low speed signal flashes, and if the channels of the two main pumps flash low signals at the same time, a 2 / 3 stack jump signal will be generated; third, when the temperature test of the temperature probe is performed, the speed of the same protection group will drop to 0

Method used

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  • Control system for main pump measurement circuit of digital nuclear power station
  • Control system for main pump measurement circuit of digital nuclear power station
  • Control system for main pump measurement circuit of digital nuclear power station

Examples

Experimental program
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Embodiment 1

[0026] Such as figure 1 and figure 2 As shown, this example is a main pump measurement loop control system of a digital nuclear power plant, including: a signal acquisition module, a high speed measurement channel, a low speed measurement channel and a speed judgment display module; the signal acquisition module collects the main probe and the backup probe respectively The rotational speed frequency signal, and the collected rotational speed frequency signal is isolated and processed and then output to the high rotational speed measurement channel and the low rotational speed measurement channel; the output signals of the high rotational speed measurement channel and the low rotational speed measurement channel are both transmitted to the rotational speed judgment display module, The speed judgment display module judges the speed of the received output signal, and realizes the display of the speed according to the result of the speed judgment;

[0027] Wherein, the high-spee...

Embodiment 2

[0042] On the basis of Embodiment 1, the processing module described in this example is an analog-to-digital conversion processor that outputs 12-bit binary data, and the set value of the rotational speed is 1000 rpm. That is, the SPLM1-PPS10 module is preferably a processor whose output actual quantity is 12 bits. The speed judgment display module can include a speed switch, and the speed setting value is 1000rpm. When the speed is greater than 1000rpm, it is judged to be a high speed, so The speed judging display module selects the output signal of the high speed measurement channel to display through the speed switching switch; when the speed is less than 1000rpm, it is judged as low speed, and the speed judgment display module displays the output signal of the low speed measurement channel.

[0043] As a further improvement of this example, the processing time interval of the processing module is 15~65520us.

[0044] As a further improvement of this example, the processing...

Embodiment 3

[0050] On the basis of embodiment 1 or embodiment 2, such as figure 2 As shown, this example also includes a power distributor for switching and distributing signals, and the power distributor is arranged between the signal acquisition module and the selection switch.

[0051] In the prior art, a power distributor is provided between the probe and the signal acquisition module, and such an arrangement causes interference to the rotational speed frequency signal, thereby affecting subsequent processing.

[0052] The power distributor is preferably an SPDM1 card, which is used to realize the transfer and distribution of signals. The power distributor has multiple channels. In practical applications, it is found that the speed frequency signal will cause interference when passing through the power distributor, so that The speed of the main pump often sends a low speed signal by mistake. Therefore, in this example, the power distributor is installed between the probe and the sele...

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Abstract

The invention provides a control system for a main pump measurement circuit of a digital nuclear power station. The control system for the main pump measurement circuit of the digital nuclear power station comprises a signal acquisition module, a high-rotations-speed measurement channel, a low-rotation-speed measurement channel and a rotation speed judging and displaying module, wherein the signal acquisition module is used for acquiring a rotation speed frequency signal of a main probe and a rotation speed frequency signal of a standby probe and outputting the acquired rotation speed frequency signals to the high-rotation-speed measurement channel and the low-rotation-speed measurement channel after conducting isolation processing on the acquired rotation speed frequency signals, the signals output by the high-rotation-speed measurement channel and the low-rotation-speed measurement channel are transmitted to the rotation speed judging and displaying module, rotation speed judgment is conducted through the rotation speed judging and displaying module according to the received output signals, the rotation speed is displayed according to the rotation speed judgment result, and the received rotation speed frequency signals are isolated and processed through the low-rotation-speed measurement channel so that current signals can be output. According to the control system for the main pump measurement circuit of the digital nuclear power station, display can be achieved as long as a main pump rotates, rotation speed frequency signals of the main pump can not be disturbed by a power distributor, and measurement of the rotation speed can not be influenced by temperature measurement signals.

Description

technical field [0001] The invention relates to a main pump measurement system, in particular to a main pump measurement circuit control system of a digital nuclear power plant. Background technique [0002] There are several problems in the main pump measurement circuit of the current digital nuclear power plant. For example, in the main pump speed measurement channel of the Ling Ao Phase II digital nuclear power plant, there are the following problems: First, limited by the processing capacity of the existing processor Limitation, when the speed of the main pump is lower than 915rpm, the display is lost, that is to say, when the speed is lower than 915rpm, the displayed speed is 0; second, the speed frequency signal of the main pump passes through the power distributor and interferes, causing the speed of the main pump to often The low speed signal flashes, and if the channels of the two main pumps flash low signals at the same time, a 2 / 3 stack jump signal will be generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B51/00G01P3/48
Inventor 卓华贵陈泳群刘坤亮蔡叶发杨新民韩伟周家正
Owner CHINA GENERAL NUCLEAR POWER OPERATION
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